The speed of light in air is 3 x 108ms-1. What is the speed in…

Physics JAMB 1992

The speed of light in air is 3 x 108ms-1. What is the speed in glass with a refractive index of 1.50?

  • 1.5 x 108ms-1
  • 3.0 x 108ms-1
  • 2.0 x 108ms-1 checkmark
  • 6.0 x 108ms-1

The correct answer is: C

Explanation

1.5 = \(\frac{3 \times 10^8}{v}\)

v = 2.0 x 108ms-1
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